Mitering-machine



(No Model.)

T. E. KING.

MITERING MACHINE.

Patented N0v. 15, 1881.

ANVENTOR:

BY I

ATTORNEYS WITNESSEQ 46m (/z-Q llamas STATES PATENT Orrrca.

THEODORE E. KING, OF WESTPORT, CONNECTICUT.

MITERING- MACHINE.

SPECIFICATION forming part of Letters Patent No. 249,638, dated November15, 18 1 Application filed September 14, 1881. (No model.)

To all whom it may concern:

Be it known that I, THEODORE E. KING, of NVestport, in the county ofFairfield and State of Connecticut, have invented a new and usefulImprovement in Mitering- Machines, of which the following is a full,clear, and exact specification.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a plan view of my improvement. Fig. 2 is a front elevationof the same, parts being broken away. Fig. 3 is a sectional sideelevation of the same, taken through the line :0 00, Fig. 1. Fig. 4 is abottom view of the middle part of the same. Fig. 5 is a rear view of thelower part of the guide-standards.

The object of this invention is to facilitate the setting ofmitering-machines and their adjustment to difl'erent sizes of saws.

The invention consists of a pair of upright jaws for guiding the saw,which jaws are mounted 011 the extremity of a pivoted lever that isattached to the under side of a suitable bench or support, theconstruction being such that when the lever is moved laterally bytheoperator the guide-jaws and saw will be correspondingly moved,whereby the angle ofthe miter may be quickly changed, as desired.

The invention further consists in the combination, with the pivotedlever, table, and guidejaws, of a lock-plate for holding the lever andjaws in the desired position; also, in the combination, with theadjusting-lever having V- shaped cross-ribs upon its rear end, of theguide-holding bars having slots and V-shaped grooves in their lowerends, and the fasteningbolts, whereby the guides can be adjusted to thesize and thickness of the saw and, also, in the combination, with theguide-holding bars having concaved and slotted jaws at their upper ends,of the semi-cylindrical guides and the fastening-screws, whereby the sawcan be readily adjusted in a vertical position and will be accuratelyguided; also, .in the lock-plate constructed with a curved flangeprovided with notches to engage with and hold the pivoted lever; also,in the combination, with the guide-carrying lever and its lock-plate, ofthe pivot whereby the guides can be quickly and accurately adjusted;also, in the combination,

with the pivot and the guide-carrying lever, of the spring for holdingthe said lever against the notched flange of its lock-plate; and, also,in the guide-carrying pivoted lever made with a knife-edge to adapt itto engage with the notched flange of its lock-plate, as will behereinafter fully described.

A represents the platform or table of the machine, which has anupwardly-projecting guide flange or ledge, B, for the timber formedalong its rear edge, and is attached to a suitable frame or support, 0.i

To the lower side of the middle part of the table A is attached aquadrantal plate, D, in such a position that the center of the circleor" which the said plate is a part will be directly beneath the inneredge of the flange B.

To the angle of the plate D is attached, or upon it is formed, apivot,E, which is thus in the center of the circle of which the said plate isa part. Along the curved edge of the plate D is formed adownwardly-projecting flange, F, in which are formed a number of radialnotches to receive and hold the knife-edge of the lever G, the saidnotches being formed in such positions that the lever G, when resting inthe said notches, will be at right angles with the inner side of theflange B, at an angle of forty-five degrees with the said flange, or atany other angle at which it may be necessary to cut the work.

The lever G has a hole formed in it at a little distance from its rearend, to receive and work upon the pivot E, the said lever being made sodeep that it will work upon the said pivot true and steady. Upon thelower end of the pivot E is placed a spiral spring, H, the upper end ofwhich rests against the lower edge of the lever G, and its lower endrests upon a washer secured to the end of the said pivot by a pin, key,or other suitable means. The rear end of the lever G projects beyond thepivot E, and to its opposite sides are secured the lower ends of twoupright bars, I, by a bolt, J, passing through a hole in the lever Grand through vertical slots in the upright bars I, so that the bars I canbe moved up and down as the size of the saw may-require. The bars I haveV shaped grooves formed in theinnersurfaces of their lower ends, toreceive V-shaped ribs formed upon the sides of the rear end of the leverGr, so that the bars I will always be kept vertical. The verticalposition of the bars I is further secured by a bolt, K, which passesthrough the slots in the upright bars I, and through a lug, L, upon theupper edge of the lever G. The lug L is made thinner than the lever Gr,so that the upper parts of the bars I can be drawn toward each other bytightening the said bolt K. The bars I are made elastic, so that theywill spring apart when the bolt K is loosened, and so that they willpress the saw -guides toward each other with a yielding pressure. Uponthe upper ends of the bars I are formed jaws M, to receive and fit uponthe guides N, which are made semi-cylindrical in form and of such alength as will give a stable bearing to the saw.

The guides N are secured to the jaws M by screws 0, which pass throughvertical slots in the jaws M and screw into the guides N. The slots inthejaws M allow the guides N to be adjusted to hold the saw vertical, orat right angles with the plane of the table A, so as to remedy anyirregularity in the construction of any of the various parts of themachine.

If desired, grooves P can be formed in the surface of the table A,radiating from the axis of the lever G and directly over the notches inthe flange F. The grooves P allow the saw to pass entirely through thework to be mitered or sawed, so as to make a clean cut.

Upon the upper edge of the flange B is formed a scale of division-marksrepresenting inches and fractions of an in ch, for convenience inadjusting the gage Q to regulate the distance of the cut from the end ofthe timber. The gage Q is formed of a small block slotted from its lowerend to receive and fit upon the flange B, and secured in place by aset-screw,

.R, passing through the arms of the said gage and clamping them againstthe sides of the said flange B.

Having thus fully described my invention, 1 claim as new and desire tosecure by Letters Patent- 1. The combination, with the apertured leverG, having V-shaped ribs on each side of its short arm, and an aperturedlug, L, of the vertically-slotted elastic upright bars I, having V-shaped grooves on the inside, and the bolts J K, whereby the saw may bemoved up and down, as described.

2. In a miterin -machine, the combination, with the holdingars I, havingconcaved and slottedjaws M at their upper ends, of the semicylindricalguides N and the holding-screws O, substantially asherein shown anddescribed, whereby the saw can be readily adjusted in a verticalposition and will be accurately guided, as set forth.

THEODORE ELMER KING.

Witnesses:

CARRIE E. NAsII, JESSIE KEELER.

